package com.hmdp.utils;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.format.annotation.DateTimeFormat;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

@Slf4j
@Component
public class RedisWorker {

    private StringRedisTemplate stringRedisTemplate;
    private final long BEGIN_TIMESTAMP=1640995200L;
    private final int COUNT_BITS = 32;

    public RedisWorker(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    public long nextId(String keyPrefix){
        LocalDateTime now= LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
        long timestamp = nowSecond - BEGIN_TIMESTAMP;

        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));

        long count = stringRedisTemplate.opsForValue().increment("icr:"+keyPrefix+":"+date);

        return timestamp<<COUNT_BITS | count;

    }


}
